The SSI Extended Range Nitrox course provides a thorough introduction to the concepts, techniques and procedures required when planning decompression dives with nitrox. Designed both as a stand-alone program and as a first step in becoming an SSI Extended Range diver, this enriched air course provides the fundamental skills that are the foundation for all future technical programs. Using a Total Diving System with a double cylinder, this course prepares divers to plan and conduct dives, with limited decompression, to a maximum depth of 40 m. It will also teach you the techniques and procedures for using breathing gas up to 100 percent oxygen, for decompression.